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Democratic presidential candidate Hillary Clinton has suggested that a key litmus test in evaluating prospective Supreme Court appointees would be their willingness to challenge “the right of billionaires to buy elections.”

Presumably, a suitable judge would indicate a desire to overturn the Citizens United decision that struck down a ban on political expenditures by corporations and unions ruled to violate the First Amendment protection of free speech – a case coincidentally centered on Citizen United’s attempt to advertise for and air a film critical of none other than Clinton.

Would Clinton seek a Supreme Court justice who would protect the rights of the likes of Carlos Slim and James Murdoch to contribute to the favored cause of a politician and shower the politician’s spouse with millions for speaking engagements?

If so, this apparent hypocrisy can be read in one of two ways:

Clinton believes that money does not have a corrupting influence so long as it is funneled through “indirect” channels

Appearances of impropriety aside, there are a few substantive questions around political speech that Clinton should be required to address.

Why does Clinton believe that the government has a compelling interest in stifling the political speech of any American, rich or poor?

How does Clinton square her supposedadvocacy of human rights with her belief in inhibiting the right to free speech — which facilitates the robust and vigorous debate essential to a liberal society?

More generally, given a system in which millions of dollars are spent on losing causes each election cycle on both the left and right, what have Americans to fear about spending so long as laws are enforced equally and impartially regarding “pay-to-play” schemes and other politically corrupt activity?